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September Weather in San Javier, Mexico

Last updated: August 27, 2025

The average temperature in San Javier, Mexico during September is a warm 28°C (83°F). Be prepared for a temperature range that can dip as low as 15°C (59°F) and soar to a sizzling 42°C (107°F). With an average precipitation of 89 mm (3.5 in) spread over 9 days, and humidity levels, averaging around 82%, expect a lush yet balmy atmosphere wherever you go!

September Temperature in San Javier

In September in San Javier, the average temperature is 28°C (83°F), with maximums reaching up to 42°C (107°F) and minimums dropping to a chilly 15°C (59°F). It's advisable to pack for both warm days and cooler nights while enjoying your travels.

September Weather in San Javier: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Javier, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Javier, September typically has an average temperature of 28°C (83°F), with highs reaching up to 42°C (107°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec616368758188858582797062
Data source: Temperature data for San Javier generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in San Javier

In San Javier in September, the precipitation amount is 89 mm (3.5 in) during a span of 9 days.

September Precipitation Trends in San Javier

The chart displays monthly precipitation patterns in San Javier, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In San Javier, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec23202811261099789283830
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Javier

In San Javier in September, humidity is 82%. With an average temperature of 28°C (83°F), this humidity feels like stepping into a warm, damp embrace, which can make traveling feel heavy and exhausting, as every movement can be met with a sticky veil of moisture that clings to the skin.

September Average Humidity in San Javier

This chart illustrates the average monthly humidity levels in San Javier, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in San Javier is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%69%63%50%39%36%60%78%82%76%80%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Javier

In San Javier in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Javier.

Maximum UV Index Levels in San Javier for September

The chart shows the monthly maximum UV Index (UVI) for San Javier in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in San Javier typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6810121212121111975
Data source: San Javier September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in San Javier Compares to Other Months

Weather in San Javier varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Javier, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in San Javier, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)23 mm (0.9 inches)78%high
February Weather17°C (63°F)20 mm (0.8 inches)69%very high
March Weather20°C (69°F)28 mm (1.1 inches)63%very high
April Weather24°C (76°F)1 mm (0.0 inches)49%extreme
May Weather27°C (82°F)1 mm (0.0 inches)39%extreme
June Weather31°C (89°F)26 mm (1.0 inches)36%extreme
July Weather30°C (85°F)109 mm (4.3 inches)60%extreme
August Weather29°C (85°F)97 mm (3.8 inches)78%extreme
September Weather28°C (83°F)89 mm (3.5 inches)82%extreme
October Weather26°C (79°F)28 mm (1.1 inches)76%very high
November Weather21°C (70°F)38 mm (1.5 inches)80%high
December Weather17°C (62°F)30 mm (1.2 inches)85%moderate

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